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Annotation of 43BSD/contrib/X/Xlib/XStringWidth.c, revision 1.1

1.1     ! root        1: #include <X/mit-copyright.h>
        !             2: 
        !             3: /* $Header: XStringWidth.c,v 10.4 86/02/01 15:40:32 tony Rel $ */
        !             4: /* Copyright Massachusetts Institute of Technology 1985 */
        !             5: 
        !             6: #include "XlibInternal.h"
        !             7: int XStringWidth (string, info, charpad, spacepad)
        !             8:     register char *string;
        !             9:     register FontInfo *info;
        !            10:     register int charpad, spacepad;
        !            11:     {
        !            12:     register int result = 0;
        !            13:     if (!*string)  /* zero length string */
        !            14:        return (0);
        !            15: 
        !            16:     if (info->fixedwidth) {
        !            17:        int length = strlen (string);
        !            18:        result = length * (info->width + charpad) - charpad;
        !            19:            /* don't pad last character */
        !            20:        if (spacepad) {
        !            21:            char *sub = string, *index();
        !            22:            while (sub = index (sub, ' ')) {
        !            23:                result += spacepad;
        !            24:                sub++;
        !            25:                }
        !            26:            if (string[length-1] == ' ')
        !            27:                result -= spacepad;
        !            28:                /* don't pad terminating space character */
        !            29:            }
        !            30:        }
        !            31: 
        !            32:     else {   /* variable width font */
        !            33:        unsigned char c;
        !            34:        register short *widths = info->widths - info->firstchar;
        !            35:        while (c = *(string++)) {
        !            36:            if ((c >= info->firstchar) && (c <= info->lastchar))
        !            37:                result += (widths[c] + charpad);
        !            38:            if (c == ' ')
        !            39:                result += spacepad;
        !            40:            }
        !            41:        result -= charpad;  /* don't pad last character */
        !            42:        if (*(string-1) == ' ')
        !            43:            result -= spacepad;
        !            44:            /* don't pad terminating space character */
        !            45:        }
        !            46: 
        !            47:     return (result);
        !            48:     }

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